Mercuryrules Gemini, Virgo
detriment Sagittarius, Pisces
symbol winged cap of Mercury
represents intellectual urge, means of communication, expression
keyword reasoning ability
cycle 88 days
A planet that exerts a relatively minor influence over a chart, Mercury rules intellect, communication, reason, and transportation - all the realms of the god it is named after.
Mercury is the communications center of a chart.
Information on the planet Mercury is up at this kick ass complete web site.